Smoke filter



FIG. 1 is a top perspective view of the new design for a smoke filter;

FIG. 2 is a front view thereof, the rear view being a mirror image thereof;

FIG. 3 is a right side view thereof, the left side view being a mirror image thereof;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof.

The broken lines in the drawings depict portions of the smoke filter that form no part of the claimed design. 

CLAIM The ornamental design for a smoke filter, as shown and described. 